Flora of Australia Online
Grevillea neurophylla subsp. fluviatilis Makinson, Fl. Australia 17A: 501 (2000)
T: upper Genoa R., Vic., A.C.Beauglehole 35004 & K.C.Rogers ; holo: MEL.
Illustrations: P.M.Olde & N.R.Marriott, Grevillea Book 3: 50 (top right & 35A) (1995), as Grevillea neurophylla form from Bemm River.
Regenerates from seed and basal suckers after floods Presumed insect-pollinated.
Erect shrub. Newer branches columnar, the foliage dense. Leaves strongly ascending, straight, crowded; longest leaves usually > 4 cm long. Flower colour; perianth white to very pale pink; limb with brown hairs. Fruits 6.5–8 mm long. Fig. 23A.
Occurs in Vic., restricted to a few rivers in East Gippsland (Genoa R., Bemm R., Cann R., Wingan R. and possibly Snowy R.), at generally much lower altitudes than the type subspecies. Also possibly occurs in N.S.W. (Wallagaraugh R.). Grows in open riparian shrub associations, usually on rocky outcrops in the flood-zone of permanent rivers. Flowers ?Aug.–Nov. Map 217.
Vic.: Wingan Inlet Natl Park, The Rapids, W side of Wingan R., 13 Nov. 1969, A.C.Beauglehole 31674 (MEL); Bemm R., c. 3.2 km NNW of Sydneham Inlet, A.C.Beauglehole 34010 (MEL); c. 4 km S of Cann River P.O. Gauge Track at Cann R., S.J.Forbes 2947 (MEL, NSW); East Gippsland, Wingan R., s.d. , ?F.Mueller (MEL 68691).
Very narrowly distinct from the type subspecies, but consistent enough in habit, longer leaf length, dense foliage, slightly smaller fruits, and ecological preference to warrant some recognition. Subsp. fluviatilis occurs at much lower elevations (usually less than 150 m alt.) than most N.S.W. and all Vic. populations of subsp. neurophylla (mostly 600–1500 m alt.). There is variation in leaf width, with populations on the Wingan, Bemm and Cann Rivers having the narrowest leaves, 0.8–1.0 mm wide, and those on the Genoa R. having coarser and wider leaves 1.2–1.6 mm wide (comparable to those of subsp. neurophylla ).
Data derived from Flora of Australia Volumes 16 (1995), 17A (2000) and 17B (1999), products of ABRS, ©Commonwealth of Australia